Streisand met with Sen. John McCain (R-Ariz.), and her representatives even released a picture of the two of them posing together, as she pushes for "more funding, more research and more attention for women's heart disease."

Streisand also visited Sen. Dick Durbin (D-Ill.) and Rep. Steny Hoyer (D-Md.) and met with the Women's Caucus of the Senate and the Women's Caucus of the House.

"The fact is a women's heart is different from a man's, yet women's hearts are under-researched, go untreated and are misdiagnosed," she said in a statement.

Streisand, who founded the Barbra Streisand Women's Health Center at Cedars-Sinai Heart Institute, also urged members of Congress to place increased focus on gender-specific data in research and to increase funding for prevention initiatives.